Tubular dead-bolt lock



P 1929' w. Y. FARNSWORTH 1,727,054

TUBULAR DEAD BOLT LOCK Filed May 14, 1927 I2 FE Ill u IIIIIIII k Ill l,

III

Patented Sept. 3, 1929.

UNITED STATES" PATENT OFFICE.

WILLIAM Y. FARNSWOBTH, 0F SEATTLE, WASHINGTON, ASSIGNOR TO FRANK E.-BEST, INO., OF SEATTLE, WASHINGTON, A CORPORATION OF WASHINGTON.

TUBULAR DEAD-BOLT Loox.

Application filed May 14,

My invention relates to improvements in dead bolts and the object of myinvention is to provide a dead bolt of simple and efliclent constructionthat is adapted to be contained within a tubular housing and to beoperated from either side of a door in which it 1s mstalled.

Another object is to provide a dead bolt 1n which the bolt member ispositively locked in both the retracted position and the outwardlyprojected or. looking position.

Another object is to provide novel throw means by which the bolt memberin a lock of this nature may be operated by two primary lock mechanismslocated on opposite sldes of a door without either of said primary locksinterfering with the operation of the other primary lock.

More specific objects are to provide a lock of this nature in which thethrow mechanism is composed of two larger discs'supported in spacedapart, relatively rigid, relation by combined throw and bolt lockingmeans, each of said larger discs being connected w1th an operatingdevice, as a primary lock mechanism, by means including a smaller dlscthat is mounted in the larger disc so that 1t may be freely rotatedthrough a limited angle relative to the larger disc.

Other and more specific objects will be apparent from the followingdescription taken in connection with the accompanying drawin s.

In the drawings Figure 1 is a longitudinal mid-section on broken line1-1 of Fig. 2, of a tubular dead bolt lock constructed in accordancewith my invention, a fragment of a door in which the lock is installedbeing shown. I

Fig. 2 is a sectional view on broken line 22 of Fig. 1, the door beingomitted.

Fig. 3 is a cross section on broken line 3 3 of Fig. 2.

Fig. 4 is a fragmentary sectional view of the rear end of the lockshowing the throw mechanism in retracted position.

Fig. 5 is a detached plan view of the throw member.

Fig. 6 is a detached isometric view of one of the smaller discs embodiedin the throw member.

Referring to the drawings, throughout which like reference numeralsdesignate like parts, I show a two part housing composed of two halfshells 6 and 7 of duplicate construction adapted to be 1927, Serial No.191,401.

placed with their open sides together to form a lock housing ofsubstantially cylindrical shape, One of said half shells normally beingpositioned on each side of the medial vertical plane of the lock whenthe lock is installed. 7 At the front end, the half shells are narrowedas at 8 and are. shaped rectangular-1y to form a guide for a rectangulardead bolt 10. Flanges 11 extend sidewise from each side of the narrowedguide portions 8 and are clinched beneath rearwardly and inwardly bentedges 12 of a front plate 13 thereby holding the half shells inassembled relation at the front end. A face plate 14 is placed over thefront plate 13 when the lock is installed. The major portion of thehousing formed by the half shells ,6 and 7 is of cylindrical shape butsaid half shells are flattened at their rear ends as at 15 to affordmore room for external locks and the flattened sides are provided withoppositely arranged circular holes that have the metal around theiredges bent inwardly to form bearing hubs 16. The two half shells aresecured together at the rear end by an end plate 17 that cooperates withlugs 18 on the half shells 6 and 7 in holding said half shells inassembled relation. A partition plate 20 having a slot 21 therein issecured within the cylindrical portions of the half shells for the rearend of a compression spring 22 to abut against. The front end of thespring 22 engages with the end of the bolt 10 and urges said boltoutwardly. A tongue 23 is secured by a pin 29 to the bolt 10 and extendsrearwardly therefrom through the slot 21 in the partition plate 20. Tothe rear of said partition plate the tongue 23 is widened as at 24 toafford shoulders 25 that are adapted to strike against the partitionplate 20 and limit the outward movement of the bolt 10.

The novel features embodied in this hous ing are claimed in a copendingapplication of even date herewith while the novel features that areclaimed in this application reside in the bolt operating meanshereinafter described.

In accordance with this invention I provide a throw member assembly,Fig. 5, em-

bodying two discs 26 of-duplicate construcis provided with a circularhub 30 that projects outwardly therefrom and is adapted to be rotatablysupported in the adjacent hearing hub 16 of the housing. Rotatablymounted within a circular opening in the hub portion 30 of each disc 26is a smaller disc 32, Fig. 6, that has two throw pins projectingoutwardly therefrom, said throw pins being adapted to fit withinsuitable holes in the respective key plugs of primary lock mechanisms 34and 35 by'which the dead bolt may be operated.

The larger discs 26 are each counterbored on both the inner and theouter sides to form substantially semicircular flanges 36 against whichthe outer flange portions 37 of the smaller discs 32 may rest. Theflanges 36 only extend substantially half way around the openings formedin the discs 26, said flanges being cut awa for the remaining half ofthe circle to a 0rd working clearance as indicated at 38 for stopmembers 40 respectively on the smaller discs 32. The sto members 40 areadapted to strike against t e ends of the flanges 36 and turn the entirethrow member assembly bodilyin operating the lock. The lost motionafforded to each smaller disc 32 by the cut away portions 38 obviatesany interference between the two rimary locks 34 and 35 and makes itpossible always to operate the bolt 10 by either lock regardless of theposition of the other look. A hole 41 in each disc 32 affords workingclearance for the end of a key, not shown, by which the primary locksare operated. The edges of the smaller discs 32 are overlapped by thethrow member 27 sufliciently to hold said smaller discs in permanentlyassembled relation within the larger discs 26.

The widened rear end 24 of the tongue 23 is provided with a notch 42extending from one edge inwardly, said notch aifording, at the rear endof the tongue, an arm having a surface 43 with which one rounded end ofthe throw member 27 may engage to retract the bolt 10. When the boltlOis fully retracted, Fig. 4, the rounded end of the throw member 27will rest within a recess 44 at the bottom of the surface 43 and thebolt will be locked in retracted position so that it cannot be releasedexcept by operation of one of the locks 34 and 35. This end of the throwmember 27 thus functions both as a throw and as a 'device for lockingthe dead bolt retracted. When the throw member 27 is released from theretracted position shown in Fig. 4 the spring 22 will move the bolt 10forwardly and the other rounded end of the throw member 27 will enter arecess 45 at the lower forward corner of the notch 42 positively lockingthe bolt against retraction by any means except the locks 34 and 35.This last mentioned end of the throw member 27 thus has only thefunction of locking the dead bolt in the forwardly projected or lockedposition and may be sepais all placed within the two half shells, as

shown in Figs. 1 and 2, and said two half shells are permanently securedtogether by crimping the edges 12 of the front plate 13 over the flanges11 at the front ends of the half shells and by applying the plate 17 andcrimping the lugs 18 over said plate at the rear ends of said halfshells. In installing the lock a hole 46 is bored inwardly from thefront edge of the door and a larger intersecting hole 47 is boredcrosswise of the door. The only mortising that is required is theshallow mortise for the reception of the end and face plates 13 and 14respectively. The lock housing, composed of half shells 6 and 7, isfirst inserted in the bore 46 and the primary lock mechanism 34 and 35are afterwards inserted from the sides so as to make operativeconnection telescopically with the pins 33. Receptacles 48 are providedfor the primary locks 34 and 35.

In the operation of this look, when the bolt 10 is in the lockedposition the forward end of the throw member 27 will rest within therecess 45 and prevent retraction of said bolt by any means except by thelocks 34 or 35. From this position, the bolt may be retracted byinserting a key in either lock and turning the discs 26 in the directionindicated by the arrow in Fig. 2, thereby turning the forward throwmember 27 out of the recess 45 and at the same time causing the oppositeor rear end of said throw member to engage with the surface 43 andretract the bolt 10, the rear end of said throw member. 27 dropping intothe recess 44, Fig. 4, when the bolt 10 is fully retracted and lockingsaid bolt in the retracted position until it is again released byemploying one of the primary lock mechanisms 34 or 35 to turn the throwmember 27 back into the position shown in Fig. 2. Movement of the throwmember 27 in the arc of a circle is limited in both directions by theends of said throw member striking on the relatively flat bottom of thenotch 42. It is characteristic of a pin tumbler lock that the key canonly be removed therefrom when the key plug is in one position. Theclearance space 38 makes it possible to turn the key plug back to theposition from which the key may be removed after either lock has beenoperated and this turning back of the lock after moving the bolt in onedirection leaves the lock so turned, in a position to move the bolt inthe opposite direction or to permit said bolt to be freely moved in theopposite direction by the other lock.

The foregoing description and accompanybodiment of this invention but itwill be understood that this disclosure is merely illustrative and thatsuch changes in this lock may be resorted to as are fairly within thescope and spirit of the following claims.

I claim:

1. In a lock of the class described, a dead bolt having a rearwardlyextending portion provided with a notch that extends from one edgeinwardly, and a throw member having two ends and movable on an arewithin said notch for moving said dead bolt, the ends of said throwmember being adapted to engage bolt, said throw member having two endsthat are rounded and are arranged to lock into said arcuate recesses atthe front and rear corners of said notch.

3. In a lock of the class described, a bolt, a tongue extendingrearwardly from said bolt and having a notch extending inwardly from oneedge, the rear edge of said'notch forming a throw engaging surface, saidnotch having recesses at the front and rear corners adjacent the bottom,a spring urging said bolt forwardly, and a throw member of substantiallytriangular shape movable on an are within said notch, one end of saidtriangular throw member being arranged to co-act with said throwengaging surface to retract said bolt and to engage within said rearmostrecess to hold said bolt retracted and another end of said throw memberbeing arranged to engage within said forward notch to hold said bolt ina locked position.

4. The apparatus as claimed in claim 3, in which the bottom of the notchis flat and serves to limit the rotation of said throw member in bothdirections.

5. The apparatus as claimed in claim 3, in which two discs are providedon opposite sides of said tongue and the triangular throw anember isrigidly secured between said two iscs.

6. The apparatus as claimed in claim 3 in which two rotatably mounteddiscs are provided on each side of said tongue and said triangularthro'w member is rigidly mounted between said discs at a point removedfrom their axes of rotation.

7. In a lock of the class described, a bolt, a tongue extendingrearwardly from said bolt and having a throw notch extending inwardlyfrom one edge, the rear edge of said notch forming a throw engagingsurface, two discs supported for rotation on opposite sides of saidtongue, throw means rigidly mounted between said discs at a pointremoved from the axes of rotation of said discs, locks for rotating saiddiscs and lost motion devices interconnecting said locks and said discs.

8. The apparatus as claimed in claim 7 in which the lost motion devicescomprise small discs rotatable through a limited angle relative to thelarger discs.

9. The apparatus as claimed in claim 7 in which smaller discs aremounted within said first named discs for rotation through a limitedangle relative thereto and the locks are connected with the smallerdiscs.

10. In a lock of the class described a housing, a dead bolt in saidhousing having a rearwardly extending tongue provided with a widenedrear end portion that is notched from one edge inwardly, the rear edgeof said notch affording a thow engaging surface, said notch beingprovided at its bottom with front and rear locking recessesrespectively, and throw mechanism embodying two larger discs rotatablysupported in said housing on opposite sides of said tongue, a throwmember rigidly secured between said larger discs and operative withinsaid notch in said tongue, the ends of said throw member being roundedand being arranged to co-act with said throw engaging surface of saidtongue to retract said throw member when said discs are turned, one ofsaid rounded ends being arranged to be ositioned within said rear recessto hold said bolt in a retracted position and the other of said roundedends being arranged to be positioned within said front recess to holdsaid bolt in a locked position, smaller discs mounted in said largerdiscs for oscillation through a limited angle relative to said largerdiscs and means for turning said smaller discs to rotate said largerdiscs and operate said bolt.

WILLIAM Y. FARNSWORTH.

